2003 VOLVO XC90
The fuel filter should be replaced at 120,000 miles (193,000 km). The filter is replaced as a complete
unit. Replace more frequently if contaminated fuel is introduced into the tank, or if there is reason to
suspect that this has occurred.
Fuel system, including filler cap, tank, lines, and connections
The ability of the fuel system to contain hydrocarbons depends upon a leak-free system. Inspect fuel
lines every 30,000 miles (48,000 km). Check for proper sealing of the fuel filler cap, which contains "O"
ring seals.
NOTE: If the fuel filler cap is not closed tightly or if the engine is running when the vehicle is refueled,
the Check Engine light (Malfunction Indicator) may indicate a fault. However, your vehicle's
performance will not be affected. Use only Volvo original or approved fuel filler caps.
Timing belt
For proper functioning of the engine and emission control systems, the timing belt and belt pretensioner
must be replaced every 120,000 miles (193,000 km). Engine damage will occur if the belt fails.
PCV system
(on turbocharged models)
The nipple in the intake manifold and the filter at the end of the PCV hose in the air cleaner should be
inspected and cleaned at 120,000 miles (193,000 km), and again at 150,000 miles (240,000 km).
Spark plugs
The spark plugs should be replaced every 60,000 miles (96,000 km) under normal driving conditions.
City driving or fast highway driving may necessitate replacement sooner.
Under normal driving conditions, spark plugs require no maintenance between replacement intervals.
When installing new plugs, be sure to use the right type and to tighten them correctly. When changing
the plugs, clean the terminals and rubber seals. Also check that the suppressor connectors are in good
condition. Cracked or damaged connectors should be replaced.
pg. 126 Maintenance
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